Algebraic Grid Generation for an Afterbody with Finite Span, Tapered Fins

摘要

An algebraic technique is presented for the generation of a 3-D grid about a pointed afterbody with four tapered, finite span fins. The grid topology is largely determined by a polar type singularity which passes through the tip parallel to the body centerline. A 3-D grid is generated by stacking a sequence of 2-D grids on predetermined blank surfaces in the fin and tip regions. On each blank surface a grid of the C-type is computed by a combination of conformal mapping and transfinite interpolation. The method is an extension of previous work for the generation of a 3-D grid about an afterbody with four constant chord, infinite span fins. An example grid is presented to illustrate the method and its characteristics are discussed. (Author)